For programmer who is looking for a light weight text editor with syntax highlighting to do their development work, I would suggest you to use Crimson Editor.

Crimson Editor is very light weight, and small size. It has a very fast loading time. Besides, it support syntax highlighting for most of the major language like HTML, CSS, PHP, SQL, Perl, C++, C, Java, Mathlab, Latex and many more! If your language is not supported you can always create your own or download from their forum.

Besides, Crimson Editor also come with other great feature like project management, macro, view in browser feature, customize the font and color, open remote file using FTP and etc…